Builder's hardware; a manual for architects, builders and house furnishers . $ fifty-five pound sashes. A third type of sash-balance is illus-trated by Figure 175. This has the gen-eral appearance of an ordinary sash-pul-ley, being mortised into the hanging-stylein the same manner. Inside of the pulley,however, is coiled a strong band-spring ofsteel, attached to the axle, which is fixed,and to the outer edge of the wheel, in the Fig- of which is wound a narrow brass ware Coribbon serving instead of a sash-cord, sothat when the sash is drawn down, the ribbon is uncoiled andthe
Builder's hardware; a manual for architects, builders and house furnishers . $ fifty-five pound sashes. A third type of sash-balance is illus-trated by Figure 175. This has the gen-eral appearance of an ordinary sash-pul-ley, being mortised into the hanging-stylein the same manner. Inside of the pulley,however, is coiled a strong band-spring ofsteel, attached to the axle, which is fixed,and to the outer edge of the wheel, in the Fig- of which is wound a narrow brass ware Coribbon serving instead of a sash-cord, sothat when the sash is drawn down, the ribbon is uncoiled andthe spring acted upon. The spring can be set to any desiredtension, and its action can further be regulated by a brake ontop of the wheel, which is tightened or loosened by turning ascrew in the face-plate. The Shumard sash-balance is madefor runs of from thirty-two to forty-six inches, and for sashesof from eight to forty pounds weight. The price per pair, fora sixteen-pound sash, is $; for a forty-pound sash, $ pair, and other weights in proportion. Chapter Shumard Sash-Coleman Hard- 120 BUILDERS HARDWARE. Chapter VII. One advantage which all of these spring-balances possess is,. that they act most strongly when the sash is clown, enablingone to move a binding window more readily than if it werehung with ordinary weights and cords, while, when the sash isup, the springs barely suffice to hold it in position and do notoffer resistance to drawing down, as is the case with objection, of course, is, that the springs are in constant ten-sion, and will, in time, loose their elasticity. They can be re-placed quite as easily as worn-out ropes ; still, most peopleseem to, prefer the old-fashioned weights and pulleys. SASH-CORD ATTACHMENTS AND WEIGHTS. Sash-cord There are several devices for attaching the cords to the sashes. The commonest method is to cut a groove on the sideof the sash with an enlargement towards the bottom, and thensimply knot the end of th
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